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git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alphashapes@629 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 25f954a52cd71e769a3820751080761eb350891d

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diff --git a/src/Alpha_complex/example/Alpha_complex_from_off.cpp b/src/Alpha_complex/example/Alpha_complex_from_off.cpp
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+++ b/src/Alpha_complex/example/Alpha_complex_from_off.cpp
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+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Vincent Rouvreau
+ *
+ *    Copyright (C) 2014  INRIA Saclay (France)
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// to construct a Delaunay_triangulation from a OFF file
+#include "gudhi/Delaunay_triangulation_off_io.h"
+#include "gudhi/Alpha_complex.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string>
+
+void usage(char * const progName) {
+  std::cerr << "Usage: " << progName << " filename.off" << std::endl;
+  exit(-1); // ----- >>
+}
+
+int main(int argc, char **argv) {
+  if (argc != 2) {
+    std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
+    usage(argv[0]);
+  }
+
+  std::string off_file_name(argv[1]);
+
+  // ----------------------------------------------------------------------------
+  // Init of an alpha complex from an OFF file
+  // ----------------------------------------------------------------------------
+  Gudhi::alphacomplex::Alpha_complex<> alpha_complex_from_file(off_file_name);
+  
+  // ----------------------------------------------------------------------------
+  // Display information about the alpha complex
+  // ----------------------------------------------------------------------------
+  std::cout << "Alpha complex is of dimension " << alpha_complex_from_file.dimension() <<
+      " - " << alpha_complex_from_file.num_simplices() << " simplices - " <<
+      alpha_complex_from_file.num_vertices() << " vertices." << std::endl;
+  
+  std::cout << "Iterator on alpha complex simplices in the filtration order, with [filtration value]:" << std::endl;
+  for (auto f_simplex : alpha_complex_from_file.filtration_simplex_range()) {
+    std::cout << "   ( ";
+    for (auto vertex : alpha_complex_from_file.simplex_vertex_range(f_simplex)) {
+      std::cout << vertex << " ";
+    }
+    std::cout << ") -> " << "[" << alpha_complex_from_file.filtration(f_simplex) << "] ";
+    std::cout << std::endl;
+  }
+  return 0;
+}
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